343312139 has 4 divisors (see below), whose sum is σ = 343353024. Its totient is φ = 343271256.

The previous prime is 343312133. The next prime is 343312169. The reversal of 343312139 is 931213343.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 931213343 = 59 ⋅15783277.

It is a cyclic number.

It is not a de Polignac number, because 343312139 - 2⁸ = 343311883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343312133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2732 + ... + 26345.

It is an arithmetic number, because the mean of its divisors is an integer number (85838256).

Almost surely, 2^343312139 is an apocalyptic number.

343312139 is a deficient number, since it is larger than the sum of its proper divisors (40885).

343312139 is a wasteful number, since it uses less digits than its factorization.

343312139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40884.

The product of its digits is 5832, while the sum is 29.

The square root of 343312139 is about 18528.6842220380. The cubic root of 343312139 is about 700.2122750768.

The spelling of 343312139 in words is "three hundred forty-three million, three hundred twelve thousand, one hundred thirty-nine".